How to install Messenger via GP

I've recently dowloaded MSN Messenger 6.0 in the form of
this one file...setup.exe.

I've extracted this file and these are the contents.

bootstrap.exe - Unknown
InstMsiA.exe - MSIEXEC for Win 95/98/ME
InstMsiW.exe - MSIEXEC for NT/2000/XP
MsnMsgs.msi - MSI Installation for MSN Messenger 6.0

I've tried adding the file MsnMsgs.msi to my group policy
for it to install and recieve the following error...

"Add operation failed. Unable to extract deployment
information from the package. Run validation on the
package to ensure the package is correct."

Is this MSI not meant for GP? If thats the case, is
there another MSI file for MSN Messenger 6.0 that I can
use to install it via GP?

Or perhaps another method to deploy on a group of
machines?

Thanks a lot for your time.

Al